I've benefitted from the answers on this site a couple of times - thanks all!!, but this is the first question I have posted.
I'd like to know the stream length in a number of watersheds I'm working on. Using a river network and watershed polygon layer I have run the Identity tool to assign each river segment with the unique code for it's catchment. The plan was to then use summary stats with the catchment code as the 'case'.
However, the fields belonging to the catchment layer are not populated in the output. Any advice as to where I am going wrong would be greatly appreciated :)
I'm using Arc 10.1, I have not been using Python, I think it might be a little beyond me at the moment!